The equation of the line passing through origin and parallel to the line 3x + 4y + 7 = 0 is:

1. 3x + 4y + 5 = 0

2. 4x - 3y - 5 = 0

3. 4x - 3y = 0

4. 3x + 4y = 0

In the given diagram, chords AC and BC are equal. If ∠ACD = 120°, then ∠AEC is:

1. 30°

2. 60°

3. 90°

4. 120°

The factor common to the two polynomials x² - 4 and x³ - x² - 4x + 4

1. (x + 1)

2. (x - 1)

3. (x - 2)

4. (x - 4)